Perhaps you should try some spelling variations:
sach tham » sach nha
sach thu » sach thue, sach thieu, cach thuc
hanh hai » thanh hai, nhanh hai, hang hai
cua viet » ca viet, hoa viet, cua vat
mang xa » lang xa, mang may, dang xay
hieu vi » hieu voi, hieu va, hieu ve
va hanh » van hanh, va thanh, va danh
hai cua » thai cua, dai cua, hoi cua
pham » phan

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach thu) or (sach tham)) ((mang xa) or (nang x)) hoi. hieu vi pham duc va hanh hai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach thu) OR (sach tham)) ((mang xa) OR (nang x)) hoi. hieu vi pham duc va hanh hai cua viet.
• Adding a wildcard symbol may retrieve word variants: tu ((sach thu) or (sach tham)) ((mang xa) or (nang x)) hoi. hieu vi pham duc va hanh hai cua viet*.